Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

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arnedanielsen
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Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by arnedanielsen »

Dear friends,

I missed the big prom on Saturday because of rain and clouds. It didn't look to good on Sunday either, but monitoring the satellite images gave me hope that there might be some short moments of clear skies in the afternoon. I setup my gear under roof (to protect it from the rain) and peaked out. Sure enough, there was some short moments of clear patches just long enough to get the Sun centered, focused and take a few shots.
To my big surprise the big prom was still there - although quite faint, but now it was completely detached.

I did a variation of short and long exposures to capture the disc and the prom. Everything was shot using using a Coronado 60mm/BF15 w/Beloptik ITF, stopped down to 50mm, Baader 35nm H-Alpha and ASI 178mm mounted on a SkyWatcher SolarQuest.

Regular exposure for the disc and brighter proms.
Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Contrast_resize.jpg
Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Contrast_resize.jpg (377.77 KiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021

Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Contrast_Colorized.jpg
Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Contrast_Colorized.jpg (2.58 MiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021 - colorized



Longer exposure to bring out the detached prom a bit better.
Sun60FD_115113_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap22_out_Contrast_resize.jpg
Sun60FD_115113_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap22_out_Contrast_resize.jpg (77.36 KiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021 - big detached prom

Sun60FD_115113_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap22_out_Invert_resize.jpg
Sun60FD_115113_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap22_out_Invert_resize.jpg (81.85 KiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021 - big detached prom - inverted

Sun60FD_115113_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap22_out_Contrast_Colorized_resize.jpg
Sun60FD_115113_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap22_out_Contrast_Colorized_resize.jpg (100.55 KiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021 - big detached prom - colorized



Combining the two shots above
Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Combined_Contrast2_resize.jpg
Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Combined_Contrast2_resize.jpg (395.52 KiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021 - disc and big detached prom

Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Combined_Contrast_Colorized_resize.jpg
Sun60FD_114401_Ha_20210912_ZWO ASI178MM(53096324)_lapl4_ap5427_out_Combined_Contrast_Colorized_resize.jpg (434.7 KiB) Viewed 422 times
Sun FD in H-Alpha 12th of September 2021 - disc and big detached prom - colorized



Click on links to view full size images.

Thanks for looking and best regards,
Arne


Best regards,
Arne
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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by DeepSolar64 »

These are really nice Arne and document the separation of that large prom from the disc. Go online and check out the last 48 hours in SDO AIA 304 animations and you can see the prom appear, rise up and separate from the disc only to see it get quickly pulled back into the disc. It’s amazing how fast that plasma can move when you realize how big these things are! Absolutely amazing!!!

Thanks

James


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by rigel123 »

Great catch Arne!


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by marios i. »

Wonderful!


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by marktownley »

These are excellent Arne! Glad you got them with that super 60mm etalon of yours!


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by nicspenceryork »

Wow, brilliant & I love how the detached prom looks in black, I can really pick out the detail.


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by EGRAY_OBSERVATORY »

Hi Arne, as James have mentioned, this was an interesting prominence due to it variations and they way it was moving and your images show that you almost definitely caught the point of it actually producing the CME. (I didn't think that CME would occur, but it certainly did)..

Thanks for sharing your excellent captures.

Terry


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by ffellah »

Fantastic disks and capture of the flying prom, Arne !

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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by arnedanielsen »

Thank you everyone for your kind comments!

James: I checked the animations... very interesting stuff. I was able to follow the prom on and off through small holes in the clouds for about an hour. During that period the prom faded and vanished.

Best regard,
Arne


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by eroel »

Arne:
Excellent FD´s crisp and clean.
Regards.
Eric.


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by Montana »

Wow!! these are really fantastic!! :bow :hamster:

Alexandra


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Re: Sun FD in H-Alpha and CaK 12th of September 2021 - big detached prom

Post by arnedanielsen »

Thank you very much Eric and Alexandra!

Best regards,
Arne


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